(4) Insert the second block between the plumb-bob string and the bottom of the post (gauge
(5) If the entire face of the second block makes contact with the string, the post is plumb.
Figure 2-14. Plumbing a post
2-8. Bridging The term bridging is used to refer to a system for bracing joists and studs. Frame walls
are bridged in most cases, to make them more sturdy. Two types of bridging are diagonal and
a. Diagonal Bridging. Diagonal bridging is nailed at an angle between the studs (see Figure 2-
15, page 2-12). It is more effective than the horizontal type because it forms a continuous truss and
keeps the wall from sagging. Whenever possible, both interior partitions and exterior walls should be
b. Horizontal Bridging. Horizontal bridging is nailed between the studs horizontally and
halfway between the sole and top plates. This type of bridging is cut to fit between the studs. The
measurements should be taken at the sole plate in case the studs are warped. Such bridging not only
stiffens the wall but also helps to straighten the studs. Notice that the bridging is staggered in Figure 2-
16, page 2-12.